The term central reservation defines the ditches that are found at the end of the slope intersecting with natural terrain. Generally these are used to control the water falling down fill or cutting slopes, among other functions.

          In this section the central reservation element is also defined referring to the ditch constructed in the median in the case of motorway templates. 

Station: Station up to which the saving or median element is applied. 

Side: Side of application.

Type: Indicate here whether the element will behave like a saving ditch or a median element. 

The following parameters are only applicable in the case of saving ditches:

Direction: If applied in cutting or fill.

Slope Distance: Point of application of the ditch measured from the  slope’s contact with the terrain.

Height dif. Control: This parameter is used to control the ditch. If the height difference between the slope ends is greater than this parameter, the corresponding ditch is applied; if it is not, it is not applied. A “zero” value indicates that the saving ditch is always applied.

A red circle indicates the saving ditch.

 This button is used to insert a new saving ditch or median element assignment. It displays the following window for defining and selecting the ditch to apply. 

 For editing the ditch element. The same window will appear as that of the “insert” option.

  Deletes the saving ditch or median element selected.